Update dataset card with paper and code links, update task category

This PR updates the dataset card to include a link to the paper, the project GitHub repository, and ensures the dataset can be found under a more suitable task category.

README.md

@@ -1,11 +1,9 @@
 ---
-license: mit
-task_categories:
-- summarization
-- text-generation
-- question-answering
 language:
 - zh
+license: mit
+task_categories:
+- video-text-to-text
 tags:
 - video
 ---
@@ -13,3 +11,5 @@ tags:
 Data cleaning, stay tuned! Please refer to https://egolife-ai.github.io/ first for general info.
 
 Checkout the paper EgoLife (https://arxiv.org/abs/2503.03803) for more information.
+
+Code: https://github.com/egolife-ai/EgoLife